PS/55 Model 5570 is the Japanese equivalent of PS/2 Model 80 (8580).
The planar VGA connector is covered by a plastic cap, and PS/55
Display Adapter-II is installed in the AVE slot. All tips for Model 80 (CPU
upgrading, planar replacement and memory problems) apply to PS/55 5570 too.
It uses Japanese reference and diagnostic diskettes. Reference diskettes
Ver.1.3x and lower are basically system specific (I myself have not tested)
and based on JDOS (KDOS3.3 for Ver.1.0 and Ver 1.15). Reference disks Ver.1.40
and higher are based on DOS/V and these diskettes are labeled as "Reference
diskette/V". Reference Ver. 1.50 covers most of all 386 class models such as
5550-S/T/V, 5570-T/V, 5540-T, 5545, 5530-S/T.
5570-S came with KDOS, and a stock unit with the original Display Adapter
probably can't handle the DOS/V based reference.
5570 was marketed in Japan and some other countries of Asia. Recently (2002)
there was a 5570 on eBay AU (reported by Lee). I suppose the beast was 5570-T or V
because it's main power switch was white. Until I saw the eBay auction, I felt
strange about the existence of English version of the reference diskette.
Maybe some of 5570 were exported to Australia. Funny enough that most of 85xx
and 95xx sold in Japan were made in Australia.
None of the 5570 have bus master issues so they can take SCSI /A without any
trouble regardless of the Power Switch color (Red or White).
-Sxx: 386DX-16, 2MB, ESDI, PS/55 Display Adapter (not so sure)
-Txx: 386DX-20, 4MB, ESDI, PS/55 Display Adapter-II
-V0x: 386DX-25, 4MB, ESDI, PS/55 Display Adapter-II
-V1x: 386DX-25, 4MB, SCSI, PS/55 Display Adapter-II
5570-S was the first model of the PS/55 line, and was released in May 1987,
shortly after PS/2 had been announced in US.
DOS used for this model was called IBM KDOS 3.30. KDOS was originally used for
IBM Japan's proprietary systems called "Multistation 5550". For detailed
information about Multistation family, please go
5570-S was not usually included in the system compatibility list for some
latest MCA options and software while 5570-T/V are listed. I suspect it is
related to the Display Adapter-I which was designed for KDOS 3.3x.
The Stock Video Adapter (though it was provided as an Option) consists
of three PCBs and requires two MCA slots (one is a 16-bit AVE slot and the
other one is an usual 16-bit slot).
According to the system guide issued on Jun.1997, 5570-S0A was specified as
||2MB (Max 16MB, 4MB max on the planar)
||70MB (Max 140MB)
||2HD x 2drives
||32bit x3, 16bit x2 (most possibly 3 slots are occupied with an ESDI /A and a Display adapter which required 2 slots.)
||Mouse, RS-232C (Max support up to 9 ports)
||CMOS memory for password check
||Should be loaded in designated MCA slot. (Not included, sold as an option)
||7190 characters JIS Level 1 and Level 2
||2MB! (for 4 screens.) I don't know what it means.
|| KDOS 3.3, OS/2 J1.0
||JY 1,497,000 (! as usual...)
|2MB system board memory kit
|70MB Hard Drive
|Display Adapter /A
||JY 320,000 (Wow! Would like to see this one.)
|5574 C-02 16" color display
|5576 001 KeyBoard
|5576 G02 Printer
5570-Txx was equipped with Display Adapter-II and the newer version of DOS,
DOS J4.0. This model might be same with 8580-1xx except the BIOS.
QCONFIG below shows 5570-T with a 486DX Upgrade module from Kingston.
Operating System : IBM PC DOS Version 6.30
Date & Time : 1999-04-10 23:41:38
Model ID : F8
Sub Model ID : 06
BIOS Revision : 00
BIOS Date : 03/15/88
Machine Type : IBM PS/55 Model 5571-T - Compatible
Processor : Intel 80486
Estimated Speed : 39.2 MHz
CoProcessor : Integrated
Bus Type : Micro Channel 32-Bit Bus
Keyboard Type : Enhanced
Equipment : 1 Parallel Port(s)
: 1 Serial Port(s)
: 2 Diskette Drive(s)
: 1 Fixed Disk(s)
: Math CoProcessor
Serial Port 1 : COM1: 03F8
Parallel Port 1 : LPT1: 0378
SCSI Device(s) : Total 1 Unit(s)
: Disk 1 Unit(s)
Primary Video : VGA
Diskette Drive 1 : 3.50" - 1.44M - 80 Track - Type 4
Diskette Drive 2 : 3.50" - 1.44M - 80 Track - Type 4
Fixed Disk 1 : 153 MB = 156672 KB = 160432128 bytes
Logical Drive C : Size 153416K = 149.8M Avail 73180K = 71.4M
Total Memory : 16000 KB = 15.6 MB
Conventional : 640 KB Free: 538 KB
Extended Memory : 15360 KB Free: 0 KB
Expanded Memory : 15264 KB Free: 14608 KB Page Frame Address: D000
XMS Memory : 14410 KB Free: 14410 KB
EMS Version : 4.0
XMS Version : 3.0
VCPI Version : 1.0
Adapter ROM 1 : Addr C0000-C3FFF SCSI
Planar : ID FFFC - PS/55 Model 5571-T
Total Slots : 8 System (DISK): 2 User Slots: 6
Expansion Slot 1 : * No Adapter Present
Expansion Slot 2 : * No Adapter Present
Expansion Slot 3 : * No Adapter Present
Expansion Slot 4 : ID FCFF - IBM Memory Expansion Adapter 2-8M 80386
Expansion Slot 5 : * No Adapter Present
Expansion Slot 6 : ID EFFE - IBM Display Adapter II
Expansion Slot 7 : * No Adapter Present
Expansion Slot 8 : ID 8EFE - IBM SCSI Adapter
5570-Vxx was the fastest model among all 5570, and was a variant of 8580-Axx.
-V1x model was equipped with non cached SCSI /A and SCSI HD along with a metal
drive cage in which 2x 3.25" drives can be attached.
I once tested following upgrades with 5570-T and -V models.
Evergreen REV to 486
Very easy to use, just plug the module onto original PGA socket then install
cache control program to get x3 (or x2) operation properly.
MCMaster by Kingston.
It's little bit difficult to use comparing to REV to 486. With this board you
can use additional 64MB of RAM. (I tested 8MB on the planar and 16MB x2 on the
adapter.) If you don't care to keep next slot vacant, you can use a 5x86 CPU
with an interposer. I once used a Cyrix 5x86-120 (3x 33MHz, actually at 99MHz
rated inner speed).
I'm not sure about Kingston's
Lightning 486 upgrade with IBM486DLC2-66.Probably you can use this CPU
upgrade. It was reported that 66MHz OSC on this board could be changed to 100MHz
OSC.The reporter used his over clocked module on his 20MHz desktop box (5530-T).
Now I have Model 80 PowerBoard in my box.